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v1.0.0
ICD-10 Guide
ICD-10 CodesB58.81

B58.81

Toxoplasma myocarditis

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/05/2025

Code Description

ICD-10 B58.81 is a billable code used to indicate a diagnosis of toxoplasma myocarditis.

Key Diagnostic Point:

Toxoplasma myocarditis is an inflammatory condition of the heart muscle caused by the protozoan parasite Toxoplasma gondii. This infection is particularly significant in immunocompromised individuals, such as those with HIV/AIDS or those undergoing immunosuppressive therapy. The parasite is typically transmitted through ingestion of oocysts found in contaminated food or water, or through contact with infected cat feces. In healthy individuals, Toxoplasma infection may be asymptomatic or present with mild flu-like symptoms. However, in cases where the parasite invades the myocardium, it can lead to myocarditis, characterized by chest pain, palpitations, and heart failure symptoms. Diagnosis is often confirmed through serological tests for Toxoplasma antibodies and imaging studies such as echocardiography or MRI to assess myocardial inflammation. Treatment typically involves the use of antiparasitic medications such as pyrimethamine and sulfadiazine, along with supportive care for heart function. Early diagnosis and intervention are crucial to prevent severe complications, including cardiomyopathy and sudden cardiac death.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Requires knowledge of protozoal infections and their systemic effects.
  • Differentiation from other types of myocarditis can be challenging.
  • Documentation must specify the immunocompromised status of the patient.
  • Requires understanding of serological testing and imaging results.

Audit Risk Factors

  • Inadequate documentation of the diagnosis and treatment plan.
  • Failure to document the patient's immunocompromised status.
  • Lack of supporting lab results or imaging studies.
  • Misclassification of the type of myocarditis.

Specialty Focus

Medical Specialties

Infectious Disease

Documentation Requirements

Detailed history of exposure, serological test results, and treatment protocols.

Common Clinical Scenarios

Patients presenting with fever, fatigue, and cardiac symptoms in the context of immunosuppression.

Billing Considerations

Documentation must clearly link the infection to the myocarditis.

Cardiology

Documentation Requirements

Echocardiographic findings, clinical symptoms, and treatment response.

Common Clinical Scenarios

Patients with unexplained heart failure or arrhythmias with a history of Toxoplasma infection.

Billing Considerations

Must differentiate from other causes of myocarditis and document any cardiac interventions.

Coding Guidelines

Inclusion Criteria

Use B58.81 When
  • Follow the official ICD
  • CM coding guidelines for infectious diseases and myocarditis
  • Ensure that documentation supports the diagnosis and includes relevant lab results and clinical findings

Exclusion Criteria

Do NOT use B58.81 When
No specific exclusions found.

Related CPT Codes

93000CPT Code

Electrocardiogram, ECG, routine ECG with at least 12 leads

Clinical Scenario

Used to assess cardiac function in patients with suspected myocarditis.

Documentation Requirements

Document the reason for the ECG and any findings.

Specialty Considerations

Cardiology specialists should ensure correlation with clinical symptoms.

88305CPT Code

Pathology examination of tissue, frozen section

Clinical Scenario

Used when myocardial biopsy is performed to confirm diagnosis.

Documentation Requirements

Document the indication for biopsy and results.

Specialty Considerations

Infectious disease specialists should document the findings in relation to Toxoplasma.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of infectious diseases, including Toxoplasma myocarditis, which enhances data accuracy and improves patient care tracking.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of infectious diseases, including Toxoplasma myocarditis, which enhances data accuracy and improves patient care tracking.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of infectious diseases, including Toxoplasma myocarditis, which enhances data accuracy and improves patient care tracking.

Resources

Clinical References

  • •
    CDC Toxoplasmosis Information
  • •
    American Heart Association - Myocarditis

Coding & Billing References

  • •
    CDC Toxoplasmosis Information
  • •
    American Heart Association - Myocarditis

Frequently Asked Questions

What are the common symptoms of Toxoplasma myocarditis?

Common symptoms include chest pain, palpitations, fatigue, and signs of heart failure such as shortness of breath and edema.

How is Toxoplasma myocarditis diagnosed?

Diagnosis is typically made through serological testing for Toxoplasma antibodies, imaging studies to assess myocardial inflammation, and clinical evaluation of symptoms.